The news chief exits the network after a 20-year career building Fox News into a ratings titan and financial powerhouse for boss Rupert Murdoch. Ailes' downfall began after former anchor Gretchen Carlson filed a lawsuit against him and other anchors began to speak out about inappropriate behavior.

Roger Ailes, the television impresario who built Fox News into a financial and ratings juggernaut, will leave the network he spent 20 years building under a cloud of sexual harassment accusations, effective immediately. Rupert Murdoch, the 85-year-old executive co-chairman of 21st Century Fox and Ai...